feat: isolate core-types package from core

[mirceanis]

What issue is this PR fixing

This PR adds the new @veramo/core-types package, which is meant to remove the dependency on core for plugins that only need the type definitions.

The new package contains all the data types that were exported from core.
The same types are also re-exported for convenience so that this is not a breaking change.

Quality

Check all that apply:

• I want these changes to be integrated
• I successfully ran pnpm i, pnpm build, pnpm test, pnpm test:browser locally.
• I allow my PR to be updated by the reviewers (to speed up the review process).
• I added unit tests.
• I added integration tests.
• I did not add automated tests because functionality remains intact.

closes #1115

[nickreynolds]

approved pending tests

[codecov]

Codecov Report

Base: 84.97% // Head: 84.30% // Decreases project coverage by -0.68% ⚠️

Coverage data is based on head (1ff0551) compared to base (42be48f).
Patch coverage: 54.02% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #1116      +/-   ##
==========================================
- Coverage   84.97%   84.30%   -0.68%     
==========================================
  Files         140      142       +2     
  Lines       14050    14060      +10     
  Branches     1428     1431       +3     
==========================================
- Hits        11939    11853      -86     
- Misses       2111     2207      +96     

Impacted Files	Coverage Δ
packages/core-types/src/agent.ts	0.00% <0.00%> (ø)
packages/core-types/src/coreEvents.ts	0.00% <ø> (ø)
packages/core-types/src/index.ts	0.00% <0.00%> (ø)
packages/data-store-json/src/types.ts	0.00% <0.00%> (ø)
packages/test-react-app/src/veramo/setup.ts	0.00% <0.00%> (ø)
packages/core/src/agent.ts	99.25% <100.00%> (-0.12%)	⬇️
packages/core/src/index.ts	100.00% <100.00%> (ø)
...es/credential-eip712/src/agent/CredentialEIP712.ts	91.79% <100.00%> (ø)
packages/credential-ld/src/action-handler.ts	88.46% <100.00%> (ø)
packages/credential-ld/src/ld-credential-module.ts	86.01% <100.00%> (ø)
... and 75 more

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